HELP! Last week I took my 01 Cadillac STS to a mechanic friend for a new exhaust system. My car ran great before I took it in, now it is having problems.He assured me that he could use a magna-flow catalytic conv., and mufflers. I think that I should not have removed the cat. My service engine light stays on, gas cap indicator light comes on, not to mention that I had to replace the fuel pump,idlemotor for surging,the oxy sensors said that gas/air mix was too lean??? I have to take it back tomorrow, feels like it is missing! What do I do?

back into 12a &13b but in the water.the oil pressure does not work the 5 doller switch or relayis new with this system working proper the relay allows the gas pump to throw the gas .can i bypass this 4 now.

my 13b marine is in a 22 ft boss marine boat if i bypass that to run my boat will i blow my motor it has oil i removed the relay and blew air at low pressure .it entered and , i think escaped out the rear sounded like. lee

My car has a garetts T25 Turbo and a heavy duty clutch on it. It is 3 years old. Whenever I floor it(or really get on) the gas, around 3.5 rpm where the turbo kicks in, my car briefly looses power in a big THUD that shakes the car. It does it in 2, 3, and 4th the most. Does anyone have an idea if its the clutch or turbo?

i have a LS1 in a 02 f-body and got an estimate on the cost of a turn key in stall. the amount is 8300 is this competitive. it's my wife's car and she is trying to decide if she wants to buy new or put the hammer to the one she's got. anyone with any info please post. :shades: